Methods and systems for operating a gas turbine engine in a multi-engine aircraft are described. The method comprises operating the gas turbine engine in a standby mode to provide substantially no motive power to the aircraft when another engine of the multi-engine aircraft is operated in an active mode to provide motive power to the aircraft, transitioning the gas turbine engine from the standby mode to the non-standby mode, and applying pulse width modulation to an air switching system of the gas turbine engine while transitioning the gas turbine engine from the standby mode to the non-standby mode.
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2. The method of claim 1, further comprising monitoring at least one of pressure or temperature of a working fluid in the gas turbine, while applying pulse width modulation to the solenoid valve.
3. The method of claim 2, wherein applying the pulse width modulation comprises adapting the pulse width modulation in real-time based on the at least one of pressure or temperature of the working fluid in the gas turbine as monitored.
4. The method of claim 3, wherein adapting the pulse width modulation comprises determining a duration of the pulse width modulation.
5. The method of claim 3, wherein adapting the pulse width modulation comprises determining a duration of time the solenoid valve stays in a first position and a second position for each cycle of a pulse width modulation signal.
6. The method of claim 1, wherein the pulse width modulation is applied to the solenoid valve in response to a request to exit an asymmetric mode of operation of the engine.
8. The system of claim 7, wherein the program code is further executable for monitoring at least one of pressure or temperature of a working fluid in the gas turbine, while applying pulse width modulation to the solenoid valve.
9. The system of claim 8, wherein applying the pulse width modulation comprises adapting the pulse width modulation in real-time based on the at least one of pressure or temperature of the working fluid in the gas turbine as monitored.
10. The system of claim 9, wherein adapting the pulse width modulation comprises determining a duration of the pulse width modulation.
11. The system of claim 9, wherein adapting the pulse width modulation comprises determining a duration of time the solenoid valve stays in a first position and a second position for each cycle of a pulse width modulation signal.
12. The system of claim 7, wherein the pulse width modulation is applied to the solenoid valve in response to a request to exit an asymmetric mode of operation of the engine.
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November 11, 2019
June 6, 2023
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